Former Two and a Half Men star Charlie Sheen has graduated from High School.

The 48-year-old actor has earned his diploma 30 years after being expelled from Santa Monica High School in 1983 because he was a few points short of the requirement and had a 33 per cent attendance record.

Speaking to TMZ, Sheen said: ''It was a loose end that always bothered me. I just have this lifelong habit of never finishing things.''

Sheen further explained that he left school to make it in Hollywood, adding: "The idea my parents had was for me go to summer school. My response was, 'There's school during the summer? That's crazy!'

''I could think of nothing worse in my first summer of freedom after all that time. I told them, 'Let me go on some auditions and if it doesn't work out, I'll go and get my GED (a diploma equivalency test) and go to college.' But I got the first job I went on. It was Grizzly II: The Predator, that horrible thing.''

Charlie further admitted that graduating from High School was one of his greatest achievements to date, stating: ''I'm going to get a spotlight, cordon the thing off. I think it should be put up somewhere, maybe in the kitchen. Or maybe just put it in a drawer.''